verb (used without object);
1. to twist the body about, or squirm, as in pain, violent effort, etc.
2. to shrink mentally, as in acute discomfort.
verb (used with object);
3. to twist or bend out of shape or position; distort; contort.
4. to twist (oneself, the body, etc.) about, as in pain.
5. a writhing movement; a twisting of the body, as in pain.
squirm, twist, worm, wrestle, wiggle
The prisoner writhed in discomfort.